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Mōri Katsunaga (毛利 勝永?, 1577 – June 4, 1615) was an officer for the Toyotomi clan following the sixteenth-century Azuchi-Momoyama period through the early years of the seventeenth-century Edo period in Japan.
Katsunaga fought in the Battle of Sekigahara and at the western legion but was defeated. Later, during the Siege of Osaka, Katsunaga, by tricking a guard, infiltrated Osaka castle. He defeated Honda Tadatomo (an officer for the Tokugawa) there in the summer.
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